How can European F-35 users reduce introduction and operating costs?

Economies of scale have reduced the production cost of the F-35 substantially. Many other costs have already been incurred on a non-recurring basis eg simulator design, preparation of manuals etc where the cost of supplying these to new customers must be far lower than for the first customers. Are these lower costs being reflected in the cost of the support packages being supplied to new customers?

With a number of European countries (I include Scandinavia as part of Europe here) having opted for F-35, there must surely be big financial savings to be gained from co-operating with other F-35 users. For example, if Belgium opts to order F-35, would it not make sense for Belgium and the Netherlands to share high cost items (such as simulators) rather than each duplicating their support purchases? The same opportunities could arise if Denmark opts for F-35 (cost-cutting co-operation with Norway).

Modern fighters have become extremely expensive, putting considerable strain on military budgets resulting in cuts elsewhere in the budget. What do you think of the idea of states that are close to or neighbouring each other – as many F-35 users in Europe are – looking to much greater co-operation? And how could they co-operate to make the greatest savings?